<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>白春鑫的作业</title>
        <style>
            body{
                background-image: url()
            }
        </style>
    </head>
    <body>
        啥都没有，请去看下一张  0.0
    </body>
</html>